Your parents will retire in 19 years. They currently have $310,824, and they think they will need $1,462,810 at retirement. Assuming they don't save any additional funds. the annual interest rate they must earn to achieve their goal would be %. Margin of error for correct responses: +/-.05. Do not enter a % sign. Do not round any intermediate work. Round your final answer to 2 decimal places (ex: if your answer is 12.345678% then you should enter 12.35)